3-Bromo-5-cyanobenzoic acid is primarily used as an intermediate in organic synthesis. It plays a significant role in the development of pharmaceuticals, particularly in the creation of active pharmaceutical ingredients (APIs). Its structure, featuring both a bromo and a cyano group, makes it a versatile building block for constructing complex molecules.

In medicinal chemistry, it is often employed in the synthesis of compounds targeting specific biological pathways, such as enzyme inhibitors or receptor modulators. Additionally, it is utilized in the production of agrochemicals, where it contributes to the development of herbicides, pesticides, and fungicides.

The compound is also valuable in material science, where it can be incorporated into the design of advanced polymers or organic electronic materials. Its functional groups allow for further chemical modifications, enabling the creation of tailored materials with specific properties. Overall, its applications span across diverse industries, making it a crucial component in research and industrial processes.